PTFE coating repair for existing pressure vessel
PTFE coating repair for existing pressure vessel
(OP)
hello
im having a case right now of an existing vessel which is PTFE/PFA internally coated - we are going to do some vessel alteration and modification of the vessel by adding some nozzles . accordingly the exiting PTFE coating will be removed before welding and shall be applied again before bringing the vessel in operation again .
my questions :
can we do repair work of PTFE curing temp at 400 c on site ?
and if so such temperature can damage the rest of PTFE coating due to heat effect ?
how is the right methodology to get the PTFE repair done ?
im having a case right now of an existing vessel which is PTFE/PFA internally coated - we are going to do some vessel alteration and modification of the vessel by adding some nozzles . accordingly the exiting PTFE coating will be removed before welding and shall be applied again before bringing the vessel in operation again .
my questions :
can we do repair work of PTFE curing temp at 400 c on site ?
and if so such temperature can damage the rest of PTFE coating due to heat effect ?
how is the right methodology to get the PTFE repair done ?





RE: PTFE coating repair for existing pressure vessel
RE: PTFE coating repair for existing pressure vessel
We expect there will be issues with the coating at some point, but for this project the choice was cycle over doing it right.
RE: PTFE coating repair for existing pressure vessel
first point of call would be to look at the original application and what they would use for a coating repair of the original PTFE lining.
Repairs and discontinuities are usually an ongoing weak point. Only you can judge if failure of the coating could be identified or could be catastrophic. You might need a different coating or material for this new nozzle and up to the original coating.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: PTFE coating repair for existing pressure vessel
i already discussed with several vendors and all of them assured that PTFE cant be cured at site due to curing temperature so we tried to convince client and now we are searching for alternative coating that gives the same surface finish but durability may not be same as normal PTEF .
RE: PTFE coating repair for existing pressure vessel